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An Inverter‐Driven Induction Motor System with a Deadlock Breaking Capability
Author(s) -
Ichikawa Takuto,
Yoshida Toshiya,
Miyashita Osamu
Publication year - 2014
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.22492
Subject(s) - inverter , induction motor , torque , engineering , direct torque control , deadlock , computer science , electrical engineering , automotive engineering , voltage , physics , distributed computing , thermodynamics
SUMMARY Induction motors are very widely used in various industrial applications. In semiconductor manufacturing processes, deadlock failure of pumps may occur due to adherence of glass material contained in the gas to the rotor. This can lead to shutdown of a manufacturing plant. Therefore, a countermeasure to prevent deadlocking of motors is required. This paper proposes a method of generating an impulse torque in an induction motor fed by an inverter. The proposed inverter circuit is composed of a conventional inverter and a few additional relays. The on‐and‐off control of the relays supplies an appropriate magnetizing current and a large torque current from the DC ‐link capacitor. In experiments, a 1.5‐ kW cage‐type induction motor generated a torque that was approximately seven times the rated torque of the motor. This large impulse torque is useful for breaking motor deadlock. © 2013 Wiley Periodicals, Inc. Electr Eng Jpn, 186(1): 51–57, 2014; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/eej.22492